MacBook Pro (Late 2009) RAM Upgrade

I bought this 13' 2.26GHz MacBook Pro on March 30th, 2010 from my local Apple Store. With these facts, I have concluded that I indeed bought the late 2009 model. I have 2x2GB DDR3 1067MHz RAM cards that I paid extra for when I bought the machine. The first 2GB came standard, and I paid the extra $100 or whatever it was for the other one. I would like to upgrade to 8GB of RAM (2x4GB cards). I was looking for the best product to upgrade to. I will pay for anything within reason, however I am really just looking for the most reliable RAM with good reviews, and good feedback. If anyone has had any experience with good upgraded RAM for a MacBook Pro that would be fantastic. I am just looking to make a good buy. Don't want to spend money on crappy hardware. Hoping someone here can help, thanks!!

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